A farmer wants to formulate a ration for dairy cows using sorghum meal (12% digestible protein) and sunflower oilcake meal (45% digestible protein) to achieve a required digestible protein of 15%. Calculate the ratio for mixing the feeds and the percentage of sunflower oilcake meal in the mixture.

2.61 Pearson square for required digestible protein of 24\% c|c &42 \\ 42-24=18 & \\ 24 & \\ & \\ &24-15=9 \\ &15 Sorghum meal cake (low protein feed): 18 parts Sunflower oilcake meal (high protein feed): 9 parts Ratio of Sorghum meal cake : Sunflower oilcake meal = 18:9 = 2:1 2.62 Percentage of sunflower oilcake meal in the mixture Formula: Percentage of sunflower oilcake meal = ( parts of sunflower oilcake mealtotal parts ) × 100 Substitute values: Percentage = ( (9)/(18+9) ) × 100 = ( (9)/(27) ) × 100 Simplify: (9)/(27) = (1)/(3) (1)/(3) × 100 = 33(1)/(3)\% Final answer: The ratio is 2:1. Sunflower oilcake meal is 33(1)/(3)\% of the mixture.